# US 2013/0158393 A1 · Concentric Drive Scanning Probe > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0158393 A1 - Document ID: US20130158393A1 - Status: Published application - Kind: A1 - Application number: 13/692,307 - Filed: 2012-12-03 - Published: 2013-06-20 - Earliest claimed: 2011-12-19 - Inventors: Michael Papac; John Christopher Huculak; Michael J. Yadlowsky - Web page: https://patentgrep.com/patent/US20130158393A1 ## CPC - A61F 9/008: using laser - A61B 1/00172: {with means for scanning} - A61B 3/102: {for optical coherence tomography [OCT]} - A61B 5/0066: {Optical coherence imaging} - A61B 5/0084: {for introduction into the body, e.g. by catheters (A61B5/1459 takes precedence)} - A61B 18/20: using laser - A61N 5/062: {Photodynamic therapy, i.e. excitation of an agent} - A61B 2018/00202: {rotating} - A61B 2018/2005: {with beam delivery through an interstitially insertable device, e.g. needle} - A61B 2018/20351: {Scanning mechanisms} - A61B 2018/20355: {Special scanning path or conditions, e.g. spiral, raster or providing spot overlap} - A61B 2562/0233: Special features of optical sensors or probes classified in A61B5/00 - A61F 2009/00897: {Scanning mechanisms or algorithms} - A61N 2005/0612: {using probes penetrating tissue; interstitial probes} - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) ## Abstract An endoprobe for microsurgical procedures is provided, including a hand-piece having a concentric drive having a proximal coupling and a distal coupling and a cannula assembly coupled to the hand-piece. The cannula assembly may include an outer tube having a longitudinal axis and an inner tube positioned within the outer tube, the distal coupling providing a first rotation to the outer tube about the longitudinal axis and the proximal coupling providing a second rotation to the inner tube within the outer tube. According to embodiments disclosed herein a method for scanning a light beam using a cannula assembly as described above is also provided. ## Claims ### Claim 1 An endoprobe for microsurgical procedures, comprising: a hand-piece having a concentric drive comprising a proximal coupling and a distal coupling; a cannula assembly coupled to the hand-piece; the cannula assembly comprising: an outer tube having a longitudinal axis; an inner tube positioned within the outer tube, the distal coupling providing a first rotation to the outer tube about the longitudinal axis and the proximal coupling providing a second rotation to the inner tube within the outer tube. ### Claim 2 (depends on 1) The endoprobe of claim 1, wherein the hand-piece includes a first motor coupled to the distal coupling to provide the first rotation and a second motor coupled to the proximal coupling to provide the second rotation. ### Claim 3 (depends on 2) The endoprobe of claim 2, further including a controller coupled to the first motor and the second motor, wherein the first motor provides a rotation to the inner tube in one direction and the second motor provides a rotation to the outer tube in an opposite direction. ### Claim 4 (depends on 1) The endoprobe of claim 1, wherein the proximal coupling and the distal coupling are controlled independently of each other. ### Claim 5 (depends on 1) The endoprobe of claim 1, wherein the proximal coupling and the distal coupling are concentrically located about a probe longitudinal axis. ### Claim 6 (depends on 1) The endoprobe of claim 1, wherein the cannula assembly comprises a stationary tube concentric and exterior to the outer tube. ### Claim 7 (depends on 1) The endoprobe of claim 1, wherein the microsurgical procedures involve the use of light, the endoprobe comprising: a first optical element attached to the outer tube and a second optical element attached to the inner tube; and wherein the rotation of the outer tube and the inner tube provides a scanning of a light beam. ### Claim 8 (depends on 7) The endoprobe of claim 7, wherein at least one of the optical elements is placed with its optical axis off-center from the longitudinal axis. ### Claim 9 (depends on 7) The endoprobe of claim 7, wherein the inner tube rotates at a first speed relative to a reference and the outer tube rotates at a second speed relative to the reference. ### Claim 10 (depends on 7) The endoprobe of claim 7, wherein the first and second optical elements comprise two lenses. ### Claim 11 (depends on 10) The endoprobe of claim 10, wherein the two lenses define a gap, the sides of the lenses facing the gap forming an angle relative to an optical axis. ### Claim 12 (depends on 11) The endoprobe of claim 11, wherein at least one of the two lenses is a GRIN (gradient index) lens. ### Claim 13 (depends on 7) The endoprobe of claim 7, wherein the optical elements comprise at least one prism or at least one dispersive element. ### Claim 14 (depends on 1) The endoprobe of claim 1, wherein the concentric drive comprises reciprocating pneumatic piston-cylinder motors to drive the cannula assembly. ### Claim 15 (depends on 1) The endoprobe of claim 1, wherein the microsurgical procedures comprise optical coherence tomography, single spot and multi-spot therapeutic laser delivery, and illumination of tissue. ### Claim 16 A method for scanning a light beam using a cannula assembly, comprising: providing a light beam through an axis of the cannula assembly; using a concentric drive in a hand-piece proximal to the cannula to provide a rotation to an inner tube and a rotation to an outer tube in the cannula; wherein each of the outer tube and inner tube is hollow and has an optical element in its distal end; and controlling separately the rotation of the outer tube and the rotation of the inner tube using the concentric drive. ### Claim 17 (depends on 16) The method of claim 16, wherein controlling separately a rotating speed includes rotating the inner tube at a first speed relative to a reference and rotating the outer tube at a second speed relative to the reference. ### Claim 18 (depends on 17) The method of claim 17, including scanning an optical beam along a 1-D path in a tissue surrounding the cannula assembly. ### Claim 19 (depends on 16) The method of claim 16, including scanning an optical beam along a 2-D path in a tissue surrounding the cannula assembly. ### Claim 20 (depends on 16) The method of claim 16, including: providing light to a 3-D portion of a tissue surrounding the cannula assembly; and collecting light from the 3-D portion of the tissue.